diff -r 57875cf423c9 -r 2372284d9457 mercurial/logexchange.py
--- a/mercurial/logexchange.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/mercurial/logexchange.py	Sun Oct 06 09:45:02 2019 -0400
@@ -18,6 +18,7 @@
 # directory name in .hg/ in which remotenames files will be present
 remotenamedir = 'logexchange'
 
+
 def readremotenamefile(repo, filename):
     """
     reads a file from .hg/logexchange/ directory and yields it's content
@@ -45,6 +46,7 @@
 
     f.close()
 
+
 def readremotenames(repo):
     """
     read the details about the remotenames stored in .hg/logexchange/ and
@@ -58,6 +60,7 @@
     for branchentry in readremotenamefile(repo, 'branches'):
         yield branchentry
 
+
 def writeremotenamefile(repo, remotepath, names, nametype):
     vfs = vfsmod.vfs(repo.vfs.join(remotenamedir))
     f = vfs(nametype, 'w', atomictemp=True)
@@ -81,6 +84,7 @@
 
     f.close()
 
+
 def saveremotenames(repo, remotepath, branches=None, bookmarks=None):
     """
     save remotenames i.e. remotebookmarks and remotebranches in their
@@ -95,6 +99,7 @@
     finally:
         wlock.release()
 
+
 def activepath(repo, remote):
     """returns remote path"""
     # is the remote a local peer
@@ -123,6 +128,7 @@
 
     return rpath
 
+
 def pullremotenames(localrepo, remoterepo):
     """
     pulls bookmarks and branches information of the remote repo during a
@@ -133,9 +139,9 @@
     remotepath = activepath(localrepo, remoterepo)
 
     with remoterepo.commandexecutor() as e:
-        bookmarks = e.callcommand('listkeys', {
-            'namespace': 'bookmarks',
-        }).result()
+        bookmarks = e.callcommand(
+            'listkeys', {'namespace': 'bookmarks',}
+        ).result()
 
     # on a push, we don't want to keep obsolete heads since
     # they won't show up as heads on the next pull, so we